In the SM, as a consequence of the \(SU(2)\times U(1)\)  and \(SU(3)\)  gauge
symmetries, the baryon number is conserved. However, the existence of baryon
number violating (BNV) processes is suggested by the excess on baryon with
respect to antibaryon in the Universe. Thus, the investigation of BNV
processes could allow to understand the evoulution of the Universe. Some
extensions of the SM include BNV processes [1]}, for example
under dimension six operators BNV can happen with a change in the baryon and
lepton numbers \(\Delta (B-L) = 0\) , or under dimension seven operators
\(\Delta (B-L) = 2\)  is allowed. The Feynman diagrams describing those
processes include the presence of heavy gauge boson \(X\)  with charge
\(\frac{4}{3}\)  and gauge boson \(Y\)  with charge \(\frac{1}{3}\) , which can
couple a quark to a lepton.
